Convert U3D to STL File

U3D to STL ......

Enclosed is a comprehensive list of resources related to the interoperability and exchange between U3D and STL files. These resources will prove invaluable in facilitating the conversion from U3D to STL file.

U3D File U3D

The U3D (Universal 3D) file format is an open-source compressed format, initiated by the 3D Industry Forum. It’s designed to store three-dimensional triangular meshes along with additional properties such as color, transparency, or texture coordinates. This format plays a significant role in the general 3D graphics industry, particularly in conjunction with 3D PDF technology. It enables the generation of PDF documents containing interactive 3D data from U3D files. Both of our U3D file converters, Autoconverter and Automesher Application, are capable of reading and writing to and from the U3D file format. This is made possible thanks to the publicly available open-source IFX conversion library provided by Intel. To streamline the process of generating 3D PDF documents, our converters create a standard TEX script that can be easily utilized with free LaTeX software.


The STL (STereoLithography) file format, developed by 3D Systems, a global leader in the 3D printing industry, exclusively contains triangular mesh data. It does not include information on face color, texture, transparency, and named groups. Although it is possible to assign RGB color values to individual vertices, it’s important to note that our STL file converter, Autoconverter software, currently does not support this extension. STL files can be saved in either binary or ASCII text formats, with the binary format being preferred due to its significant reduction in file size. Additionally, it’s worth noting that triangles in STL files are always defined in millimeters, and our STL converter will perform the necessary units conversion if required.